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Name
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Candidate Number
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Centre Number
0610/06
BIOLOGY
Paper 6 Alternative to practical
May/June 2003
1 hour
Candidates answer on the Question Paper.
No Additional Materials are required.
READ THESE INSTRUCTIONS FIRST
Write your Centre Number, Candidate Number and Name on all the work you hand in.
Write in dark blue or black pen in the spaces provided on the Question Paper.
You may use a soft pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.
Answer all questions.
The number of marks is given in brackets [ ] at the end of each question or part question.
For Examiner’s Use
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details. If any details are incorrect or
missing, please fill in your correct details
in the space given at the top of this page.
Stick your personal label here, if
provided.
1
2
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This document consists of 9 printed pages and 3 blank pages.
SP (SC/KS) S41838/4
© CIE 2003
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CAMBRIDGE INTERNATIONAL EXAMINATIONS
International General Certificate of Secondary Education
2
1
Three different dough mixtures, samples A, B and C are prepared using the same quantity
of flour and water. Each sample of dough is carefully mixed, kneaded, shaped and placed in
separate measuring cylinders and kept in a warm place.
Sample A contains warm water, sugar, flour and yeast.
Sample B contains warm water, sugar and flour.
Sample C contains warm water, sugar, flour, yeast, and substance X.
The highest level of the dough is marked on the side of each measuring cylinder, as shown
in Fig. 1.1.
30
highest
level of dough
20
10
Fig. 1.1
(a) Suggest two other factors which should be kept constant to ensure that the results for
the samples can be compared.
1. ......................................................................................................................................
2. ..................................................................................................................................[2]
(b) At 20 minute intervals, the volume of each dough sample is measured and recorded.
The results are shown in Table 1.1.
Table 1.1
volume of dough / cm 3
time / min
(i)
sample A
sample B
sample C
0
12
12
12
20
18
12
20
40
26
12
32
60
34
13
41
80
39
13
48
100
45
13
48
120
48
14
48
On the grid opposite, plot the data shown in Table 1.1 for samples A, B and C as
three curves on one set of axes.
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Examiner’s
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3
For
Examiner’s
Use
[5]
(ii)
Describe the curves you have drawn for the three samples.
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..............................................................................................................................[3]
(iii)
Use your graph to find when there is the greatest difference in volume between
samples A and C.
..............................................................................................................................[1]
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(iv)
The volume of sample A changed differently to the volume of sample B. Suggest
an explanation for this difference.
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..............................................................................................................................[2]
(v)
The volume of sample A changed differently to the volume of sample C. Suggest
an explanation for this difference.
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..............................................................................................................................[2]
[Total : 15]
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5
2
For
Examiner’s
Use
Fig. 2.1 shows three stages in the germination of a grain of maize.
Fig. 2.1
(a) Name two conditions that are necessary for the successful germination of a seed, other
than the presence of water.
1. .............................................................
2. .............................................................[1]
(b) Describe an investigation that you could carry out to show the need in seed germination
for one of the conditions you named in (a).
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[3]
[Total : 4]
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3
For
Examiner’s
Use
Fig. 3.1 shows the external appearance of animal A.
animal A
Fig. 3.1
(a) (i)
Make a large, labelled drawing of animal A.
Label two features that are characteristic of this group of animals.
[4]
(ii)
Measure the length of animal A in Fig. 3.1 and in your drawing. Calculate the
magnification of your drawing.
length of animal A: in Fig. 3.1 ..................................................................................
in drawing .................................................................................
magnification ........................................................................................................[2]
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Fig. 3.2 shows the external appearance of animal B, which is classified in the same group
as animal A.
For
Examiner’s
Use
animal B
Fig. 3.2
(iii)
State one similarity which indicates that these two animals are classified in the
same group and state one difference between them.
similarity ...................................................................................................................
difference ..............................................................................................................[2]
(iv)
Name the group to which animals A and B belong.
..............................................................................................................................[1]
[Total : 9]
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4
The apparatus shown in Fig. 4.1 was set up under bright light for a period of five hours. At
the start the apparatus was completely full of water. During this time, a gas was collected at
the top of the graduated tube.
bright
light
rubber bung
gas
0
10
graduated tube
20
30
40
50
cm3
glass funnel, upside down
pondweed
Fig. 4.1
(a) (i)
How would you show this gas was oxygen?
..............................................................................................................................[1]
(ii)
Name the process within the plant responsible for the production of oxygen.
..............................................................................................................................[1]
(iii)
Determine the volume of gas collected in five hours and the rate of gas production
per hour.
volume ......................................................................................................................
rate .......................................................................................................................[2]
(iv)
How would you use this apparatus to obtain reliable results to show the effect of
differing light intensities on the production of oxygen?
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..............................................................................................................................[2]
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9
(b) The pondweed was placed in hydrogencarbonate indicator solution, which was red in
colour when the tube was set up. The tube was left for five hours in bright light, as
shown in Fig. 4.2.
(Hydrogencarbonate indicator is purple in alkaline conditions, red in neutral conditions
and yellow in acidic conditions.)
bright
light
Fig. 4.2
(i)
bright
light
Fig. 4.3
bright
light
Fig. 4.4
Suggest what colour you might observe in the tube in Fig. 4.2 after five hours in
bright light and give an explanation for this.
colour ......................................................................................................................
explanation ..............................................................................................................
..............................................................................................................................[2]
(ii)
One water shrimp was introduced into a similar tube with pondweed, Fig. 4.3, and,
again, the tube was placed in bright light for five hours.
Suggest what colour you might observe and give an explanation for this.
colour .......................................................................................................................
explanation ...............................................................................................................
..............................................................................................................................[2]
(iii)
Three water shrimps were introduced into a similar tube with pondweed, Fig. 4.4,
and, again, the tube was placed in bright light for five hours.
Suggest what colour you might observe and give an explanation for this.
colour ......................................................................................................................
explanation ..............................................................................................................
..............................................................................................................................[2]
[Total : 12]
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